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Washing wool with surfactants and a non-toxic solvent microemulsion: influence of water hardness;
Lavado de la lana con tensioactivos y microemulsiones de disolvente ecológico: influencia de la dureza del agua
Carrión Fité, Francisco Javier
Universitat Politècnica de Catalunya. Departament d'Enginyeria Tèxtil i Paperera; Universitat Politècnica de Catalunya. TECTEX - Grup de recerca en Tecnologia Tèxtil
In this work, detersive power was studied after washing a soiled wool fabric with addition of a non-toxic solvent microemulsion to conventional wash formulations with the aim of improving the performance of the conventional washing. The non-toxic solvent used was dimethyl sulfoxide micro-dispersed with an amphoteric surfactant as emulsifier. The fabric was washed with biodegradable non-ionic surfactants such as an alcohol ethoxylate (AE) with 7 m.E.O and an alkyl polyglucoside with 1.4 glucoside groups (APG). The fabric used was EMPA 107 wool (soiled with standard impurities). The non-ionic surfactants were used separately and in mixture in varying proportions for the washes. Given the large amount of impurities in the wool fabric, sodium carbonate and sodium chloride were used to attain a suitable pH to avoid damaging the wool. The fabric was washed at low temperature with water of different hardness (20ºhf, 30ºhf and 40ºhf). In addition, the sequestering agent DTPMP was used to obtain an improvement of detersive power at the hardness of 40ºhf.
Àrees temàtiques de la UPC::Enginyeria química::Indústries químiques::Química tèxtil
Àrees temàtiques de la UPC::Enginyeria química::Indústria dels processos químics::Agents tensioactius
Washing powders--Testing
Surface active agents--Industrial applications
Detergents -- Anàlisi
Tensioactius -- Aplicacions industrials

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